Examine source code of Paint Swirl

{
  "theme": {
    "images": {
      "theme_frame": "paintsweranewl5head.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Paint Swirl",
  "manifest_version": 2,
  "description": "See more designs at <a href=\"https://outgoing.prod.mozaws.net/v1/59547e6824ee685e48cd4ac5c3c4de39f4909bbd3b47323bfb59e4293205c3c1/http%3A//www.zazzle.com/ultimatedigital\" rel=\"nofollow\">http://www.zazzle.com/ultimatedigital</a>"
}